You did not mentioned in which area you are weak. If you are weak in Sentence correction of verbal then I would suggest by Manhattan GMAT SC
book and read it diligently. If you are weak in area of critical reasoning then go for Powerscore CR
bible which is the good one. For quant, go through OG-10 and OG-11 and once you finish them you can go for GMAT club challenges
Nobody dies a virgin, life screws us all.